Electric Forces and Potential Differences

The video tutorial covers solving a kinematics problem involving a ball thrown vertically. It calculates acceleration, maximum height, and potential difference using kinematic equations and force analysis. The tutorial also explains the impact of gravitational and electric forces on the ball, and concludes with a call to action for viewers to subscribe and send questions.

What is the initial condition of the ball in the kinematics problem?

• The ball is thrown horizontally.

• The ball is thrown straight up.

• The ball is dropped from rest.

• The ball is thrown at an angle.

What is the overall vertical displacement of the ball when it returns to its starting point?

• 0 meters

• 10 meters

• 5 meters

• 20.6 meters

What is the final velocity of the ball at its maximum height?

• 20.1 m/s

• 0 m/s

• 9.8 m/s

• 4.1 m/s

Which force acts downward on the ball besides gravity?

• Magnetic force

• Frictional force

• Normal force

• Electric force

What is the direction of the electric force on a positive charge in an electric field?

• Opposite to the electric field

• Perpendicular to the electric field

• In the same direction as the electric field

• No force acts on it

What is the formula for the electric force acting on a charge?

• F = Q * E

• F = m * a

• F = B * I * L

• F = k * q1 * q2 / r^2

What is the calculated electric field strength on this planet?

• 2.0 * 10^3 N/C

• 5.0 * 10^3 N/C

• 9.8 N/C

• 1.95 * 10^3 N/C

How is the potential difference between two points calculated?

• By dividing the electric field by the distance

• By subtracting the electric field from the distance

• By multiplying the electric field by the distance

• By adding the electric field and the distance

What is the potential difference in volts between the starting point and the top point?

• 20.6 volts

• 1.95 * 10^3 volts

• 4.02 * 10^4 volts

• 40.2 volts

What is the potential difference in kilovolts between the starting point and the top point?

• 4.02 kilovolts

• 40.2 kilovolts

• 1.95 kilovolts

• 20.6 kilovolts